A brief video posted by a sheriff's office offered a firsthand glimpse of the deadly wildfires ravaging northern California.

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The 11-second clip shows a fierce blaze encroaching on a roadway in Sonoma County earlier this week.

The Sonoma County Sheriff's Office posted the video on its Facebook page with the following message:

"One of our Deputies working the night the Fire began shot a quick video of the conditions the Deputies and Fire Personnel were facing at the onset of the Fire. This particular stretch of roadway was in the area of Franz Valley Rd at the onset of the fire's entrance to Sonoma County.

As both the Sheriff's Office and a County Agency full of Sonoma County residents, we are proud of all who have risked harm to help each other out in times of peril. This is but one moment in a series of moments that will end up defining the strength of our Community through what will be a pinnacle moment in Sonoma County history.

Please be safe, be calm, and be caring for your neighbors. We will get through this disaster together !!!"

At least 17 people have been killed in the wildfires, with that number expected to continue rising.